/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.trino.spi.function;

public interface AccumulatorStateFactory<T>
{
    T createSingleState();

    Class<? extends T> getSingleStateClass();

    /**
     * Return value is also guaranteed to implement GroupedAccumulatorState
     */
    T createGroupedState();

    Class<? extends T> getGroupedStateClass();
}
